EarthBox is made from durable plastic components which are UV stabilized. It holds 2.0 cu.ft. of Potting Mix or 3 Gallons of Water. The EarthBox produces double the yield of a conventional garden - with less fertilizer, less water and virtually no effort. The Staking System is a hassle-free way to grow tomatoeswith no more awkward cages or trellises. Grow tomatoes, peas, beans, and other tall plants in the yard, on the deck, even indoors. Includes 1 EarthBox®, 1 Aeration Screen, 1 Water Fill Tube, 2 Fitted Covers 6 Casters, 6 Sturdy Aluminum Tubes, 4 Connectors, 2 Clips with Stainless Steel Hardware and 2 Feet. The EarthBox has a One-Year Warranty and a instruction sheet.